Rotary engine.



No. 849,326. 'PATENTED APR. 2, 1907.

J. BURN.'

ROTARY ENGINE.

APPLICATION FILED MAY 4. 1905.

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. J. BURN.

ROTARY ENGINE.

APPLICATION FILED MAY-1. 1905.

lUNITED STATES PATENT OFFICE.

JAMES BURN, OF CHESTER, PENNSYLVANIA, ASSIGNOR OF ONE-THIRD TO JOHN H. BURN AND ON E-THIRD TO MYRA BURN THOMPSON, OF CHES- TER, PENNSYLVANIA.

ROTARY ENGINE.

Patented April 2, 1907.

Application filed May 4,1905. Serial No. 258,788.

To all when?, t may concern:

tical sectional view of the same, parts being Fig. 3 is a vertical sectional view on the line 3 3, Fig. 5. Fig. 4 is a similar section on the line 4 4, Fig. 5. Fig. 5 is a top plan view of the engine. Fig. 6 is a top plan view of one of the abutments detached. Fig. 6*1 is a plan view of the other abutment.

in elevation.

` Fig. 7 is an irregular vertical section of the engine.

7 represents the casing, having end flanges 8.

9 is the shaft, carrying a disk l0, from each side of which a collar 11 12 extends concentric with the shaft, thereby forming cylinders 13 and 14. The collars 11 and 12 will hereinafter be referred to as walls of the cylinders.

The heads 15 and 16 of the cylinders are each provided with radial flanges 1S and 19, respectively, by means of which they are bolted or otherwise suitably secured to the flanges 8 of the casing. Each head is provided with a collar 2O and 21, respectively, to be fitted with suitable journal-bearings and packing and to be closed with a gland. Each head is provided with a steam-abutment 22 23, the working face 24. 25 of which is formed of a compound curve and is at a right angle to the periphery of the head, the faces 24 and 25 being continuous from one end of its cylinder to the other, as will be seen in Fig. l. The highest point of the abutment is flat, abuts the disk 10, with which it has a steam-tight joint, that portion of the abutment adjacent the disk 10 being level or flat for a short distance.

26 27 are ports leading to the surface ofthe face 24 25, which act as supply and exhaust ports according to the position of the aclmission-valve, as will be hereinafter eX- plained.

Each cylinder is provided with a pistonhead 28 29, which is mounted in a slide'way 30, formed in the shaft 9, there being similar slideways or grooves 3l formed in the cylinder-walls, the edge of the pistons bearing on the faces 24 and 25 being provided with a groove in which is seated a spring-pressed bearing-face to provide a steam-tight joint between it and the face.

32 is the valve-chest,mounted on the cylinder, having the inlet-ports 33 and 34 and the exhaust 36 is a suitable slide-valve mounted in the chest 32 and controlling the ports 33 and 34, 37 being the valve-stein.

Referring to Fig. 5, 3S represents the exhaust-port, and 39 the steam-port, in the cas A L40 and 41 are steam channels or ports cut or grooved in the exterior face of the cylinder-walls diametrically opposite each other, which lead into the series of ports on the face of the compound curve to one side of the highest point of the abutment, as shown in the drawings, and communicate with the steam-ports formed in the casing.

42 and 43 are the exhaust ports orehannels grooved in the outer face of the cylinderwalls.

The steam-ports 40 and 41 are cut or grooved in the cylinder-walls corresponding with the steam-port 39 on'the line E F, Fig. 5, while the exhaust-ports 42 and 48 are also cut or grooved in the face of the cylinder-walls and correspond with exhaust-port 3S on the line G H, Fig. 5.

In order to reverse the engine, the valve is moved over so that the ports designated in above description as steam-ports become exhaust-ports and exhaust-ports become steam-ports.

The engine, as shown in F ig. 7, is taking steam through ports 89 40 40u. The steam will follow the blade or piston 2S through port 40 until cut off at point marked W on the cylinder-wall. The exhaust is through port 38 at Then the blade 29 arrives at the position that blade 2S occupies in the drawings, port 4l will be in communication with port 39 and port 43 will be in communication with port 3S. It will be understood IOO from the above that the steam follows the blades 28 and 29 and that the exhaust leads them.

Any suitable springepacking may be placed in the abutments, also in the ends of the piston-blades 28 and 29, to maintain a steamtight joint.

As the steam forces the blades 28 and 29 around, their ends slide on the cam or curved faces 24 and 25 of the abutments 22 and 23, said blades sliding in the groove in the shaft and through a slot cut through the disk 10, as shown in Fig. 3.

The blades or pistons 28 and 29 are each provided with a projection 45, which projects beyond the wall of the cams into the bore of the head, as shown in Fig, 1, whereby the slideway or slot 30 in the shaft is closed, thereby maintaining a steam-tight joint between the shaft 9 and heads 15 and 16. The same provisions are to be made on the blades in the slot 31 in the walls of the cylinders 11 and 12. I

What I claim, and ldesire to secure by Letters Patent, is-

. 1. The combination with the shafts, of

cylinders turning with the shaft and provided with inlet and exhaust port, pistons carried by the cylinders and non-rotatable cylinderheads provided with inlet and exhaust ports adapted to register with the ports in the cylinders to admit steam to and exhaust steam from the cylinders.

2. In a rotary engine, the combination with cylinders fixed eoncentrically to said shaft, the bottom of the cylinders lbeing slotted, of pistons mounted on and slidable axially of the shaft and through the slots in the bottom of the cylinder, fixed non-rotatable heads for the cylinders, cams on the inner faces of the cylinders constructed to operate said pistons and exhaust and inlet ports formed in the heads and cylinder-walls, controlled by the movement of the pistons, the position of which is controlled by the cams.

In testimony whereof I affix my signature in presence of two witnesses.

JAMES BURN.

l/Vitnesses DANIEL Woon,- SAM. D. CLYDE. 

